Reversible rotary blower



F. B. YlNGLlNG REVERSIBLE ROTARY BLOWER July 6, 1948.

3 Sheets-Sheet 1 Original Filed Sept. 19, 1941 M RN July 6, 1948. F. B.YINGLING REVERSIBLE ROTARY BLD-WER original Filed sept. 19, 1941 3Sheets-Sheet 2 .llll ill I July 6, 1948. F. B. YINGLING REVERSIBLEROTARY BLOWER 5 Sheets-Sheet 3 Original Filed Sept. 19, 1941 I INVENTOR.)Fifi/vx 21 Y//vGu/fs Reissued July 6, 1948 REVERSIBLE RTARY BLWER FrankB, Yinglng, Hamilton, Ohio Original .Na 2,355,494, dated August 8, 1944,Serial No. 411,560, September 19, 1941. Application for reissue 577,253

Claims.. l

My `present invention relates to an improved reversible rotary blowercapable of delivering a desired volume of fluid pressure when rotatingin either forward or vreverse direction, and control means are providedVfor changing the entry direction to, through, and out of vthe blowercasing, in accord with changes in the rotational movement of the blower.While my improved blower is adapted Ifor impelling various vfluidcurrents,v it is particularly designed lfor impelling air, preferably atcomparatively low pressure for scavenging use with internal combustionengines of the Diesel type. When such engines are adapted for shippropulsion the blower' of my invention is especially applicable forcombination with the engine, and the reversible blower is controlled bythe reversing devices of the engine.

In carrying out my invention I have provided a compactly arranged4blower that occupies comparatively small space, which is fashioned of aminimum number of parts .to facilitate manufactuil'e, installation, andoperation of the apparatus, and which, because of its simplicity inconstruction, is easily operated when necessary, and durable.

The invention consists in certain lnovel c9111.- binations andarrangements in the blower -including an .exterior housing and interiorimpeller casing, with a single valve at each side of the casing tocontrol an intake port and an outlet port, .and means for changing thepositions oi the valves to vary the entry and delivery 1direction civair currents through .the casing.

In the accompanying drawings I have illustrated one complete example ofthe physical embodiment of my positive displacement blower, which isinstalled for use with. a Diesel engine of the marine type.

Figure l is an end view of the engine showing the blower mountedthereon, and the control mechanism for the engine and the valvemechanism of the blower.

Figure 2 is a side elevation of the blower` showing also in sideelevation a portion o f the end o f the engine on which the blower ismounted.

Figure 3 Ais a vertical sectional view as at line 3 3 of Figure 1.

`Figure 4 is a vertical sectional View transversely ofthe engine as atline 4,-4 of Figure 2.

Figure 5 is a horizontal sectional View as at line 5-5 of Figure 4.

Figure 6 is a sectional View showing the body of Ithe -blower, but withthe interengaging impellers in section and 'rotating in directionopposite to that of Figure 4, the twovalves in posi- February 10, 1945Serial No.

tions opposite to the valves in Fig-ure 4, and the air currentsentering, passing through, and being delivered from the casing inldirection opposite to that of Figure 4. v

Figure 'l is a vertical sectional view showing especially the details ofthe two impellers and their .driving sears or onions.

In .order that utility of the .blower may readily be appreciated, I haveindicated -in Figures i and 2 a portion of the engine as E, with itsIna/in shaft or crankshaft S `from which the blower is operated, and inFigure 2 is seen a portion of the ail' duct D that ,supplies lowpressure :air currents.

to .the cylinders of ythe engine for scavenging purposes, as well as airyfor combustion in the fuel mixture,

The nevers-ibis positive displacement b lwei' is shown as located ormounted .on the end of the engine and extending transversely thereof,with the shafts of ,the rotary interengaging impellers and the hingesorfpivots of the two control valves l parallel with the main shaft S ofthe engine.

The compactly arranged `apparatus includes an exterior housing .I having.openings in its opposite side walls, and these side openings are closedby exterior bearing plates 2 and k3 which .also

form frame portions `that are bolted to the op? posits sides of thehousing.

Within the housing and between :these side plates is provided 4aninterior impeller casing that includes two transversely extending,upperand lower, spaced concaves 4 and v,5, here shown* as approximatelysemifcircular in cross-section and in which the two interengagingimpellers .or rotors G 7and l revolve in well vknown manner to create`the air currents.

These firnpellers `or rotors are synchronized to rotate in yoppositedirections so that their wings will sweep :the lair thrmtg-h therespective `oonca-ves croate the desired air blast vwhich passes throughthe interior casing, and one wing of one impeller .cooperates with the.pivotal Aportion .of the other -i-mpejller to create a central `airsealbetween `the two spaced :wall openings of lthe casing.

In "Fig, .4 the rotor ii is rotating `counter-clockwise and the rotor lis turning clockwise for creating the `passage of a current of air lfrom:the

right end opening through the interior casing to the A'left end thereofas indicated by arrows. It will be understood that when the engine isreversed the blower also is reversed, and the rotors of the impeller inFig. 6 rotate las indicated 'by the arrows, i. e. rotor turns clockwiseand rotor l 4turns counter-clockwise Ato create the air eu-rf rent fromthe left end of the casing, therethrough, and out at the right end ofthe casing. The two rotors of the impeller, which are shown as havinghollow wings, are mounted on their respective shafts 8 and 9 and theseshafts at their ends project through the sides of the casing, and alsothrough bearing bosses Ill of the side plate 2 and bearing bosses' II ofthe side plate 3. These bosses are located on the outer sides of theside plates, and the ends of the shafts are journaled in the bosses andprovided with usual fastening means as nuts as indicated.

The interengaging rotors of the impeller are synchronized for operationwith theengine shaft S, and power is transmitted from the mainshaft tothe blower apparatus through an intermediate train of gears and pinionsindicated as I2, I3, I4, I and I6, the large gear I2 being mounted onthe engine shaft S, and the last small gears or pinicns I5 and I6 beingmounted on the ends of the blower shafts as best seen in Figures 3' and7.

Thefopposite sides of the interior casing including the ends of theconcaves 4 and 5 are `closed by the plates 2 and 2a and 3 and 3a,

and the removal of these plates, of course, permits ready access to theinterior of the casing for servicing the rotors of the impeller andother parts of the blower.

vAs best seen in Figures 4 and 6 the several parallel edges of thespaced semi-circular or semi-cylindrical concaves 4 and 5 may befashioned with out-turned lips or flanges that provide seats I1 alongone edge of each of the four ports I8, I9, 20, and 2| that are angularlydisposed in pairs between the concaves, and the ports extend from oneopen side of the impeller casing to the opposite open side.

Each port I8 and I9 at opposite ends of the impeller casing merges withan adjoining wallopening in the casing, and these ports are a1-ternately used as air intake ports opening into the interior of thecasing. Each port 2'0, 2|, at opposite ends of the impeller casing alsomerges with an adjoining wall-opening in the casing, and these ports 20,2fI, which are disposed angularly of ports I8 and I9, are alternatelyused as outlet ports for air currents from the interior I of theimpeller casing.

In Figure 4 the lower right hand intake port I9 is shown as open, andthe upfper left hand outletv or delivery port '2| is open, wlrile thelower cf'l; hand intake port I8 is closed by a pivoted or hinged flapvalve 22, and the upper, right hand outlet or delivery port 20 is closedby an op'positely arranged pivoted or hinge valve 23. Thus it will beapparent that one valve closes an intake port while the other valvecloses an outlet port at the opposite sides of the irnpeller, leaving anintake port open at one side of the impeller and an outlet or deliveryport open at the opposite side of the mpeller. These valves areconnected so that they move simultaneously to chan-ge the flow of aircurrents through the blower casing when the rotary movements of therotors are reversed in accord with the reversal of movement ofthe engineshaft S.

In Figure 4 the valves are arranged so that the air current is passingthrough the casing from right to left, while in Fig. 6 the positions ofthe valves have been changed and the air current is passing through theimpeller casing from left to right.

AAs indicated in the drawings the adjoining ports at each sidel oftheimpeller are arranged 4 at approximately S10-degree angles, and eachvalve is movable through an arc of approximately ninety-degrees to openone valve por-t and close the angularly adjoining lport, therebyproviding a compactly arranged valve mechanism for directly controllingthe movement of air currents to, through, and out of the impellercasing. The valves are each provided with a hinge pin or journal pin as24 and 25 respectively, which pins pass through the openings at thesides of the impeller casing, and as seen in Figures 1, 2, and 5 theends of the pins are journaled in bear- 'ing bosses as 26 mounted uponthe exterior sides of the iplates 2 an-d 3 of the housing.

These hinge pins of the valves are connected with each other at thefront of the blower by means of lever arms 21 and 28 and the connect-Ning link 29 and .the arms and pins with their valves are movedysimultaneously by a pull or push on a short operating link 30 that ispivoted to the lower free end of a lever arm 3l mounted on the valve pin25 at the rear of the blower.

As best seen in Figures 4 and 6 the two intake ports I8 and Il!! openoutwardly to a constant intake chamber 32, and the outlet or deliveryports 2li and 2l open outwardly from the interior of the impeller casingto an outlet chamber or constant delivery chamber 33 for air underpressure. These respective chambers are sh-own in Figure 6 as inclosedwithin the exterior housing and formed -between the outer walls of thehousing and the concaves of the interior impeller casing, which concavesare surrounded by the respective chambers. The intake ports I8 and i9afford direct communication between the constant intake chamber andtheinterior of the impeller casing, and the outlet ports '20 and 2| afforddirect communication between the interior of the impeller casing and theoutlet or constant delivery chamber, and the valves 22 and 213 havedirect control of these ports to change the direction of flow of aircurrents. livery chamber or pressure chamber 33 delivers air underpressure to the interior passage of an angular connection 34 that unitesthe blower with the air duct D of the engine, and the' intake chamber 32receives air through the pas-v sage in the feed nozzle 35 and pipe 36.

It will be apparent that the air currents at all` times move in the samedirection through the passage of the connection 34 toward the air duct Dof the engine, but the entry-direction of air to the impeller casing maybe changed from one side of the impellers to the opposite side thereofthereby reversing the flow of air currents through the casing andchanging the outlet or delivery direction of air currents from one sideto `the other side of the imp-allers.

These changes in the directional flow of air currents through theinterior of the impeller casing may be under manual control, but whentheblower apparatus is combined withthe engine as illustrated thecontrol of the valves is` co-ordinat-ed with the engine control so thatthe valves are reversed from the engine control sta-- 1 and 2 by aconventionalized hand lever 31 and;

The dethe connecting link 38, and suitable linkage is provided to thelink 30 (heretofore mentioned) as indicated at 39, 40, 'and 4|, forsimultaneously changing the position of the two valves.

Having thus fully described my invention, what I claim as new and desireto secure by Letters Patent is:

1. In a reversible rotary blower, the combination with an exteriorhousing and a spaced in terior casing forming a constant intake chamberand a constant delivery chamber, said casing comprising two spacedhemispherical concaves having each an intake port and an outlet port ateach side ol the blower, said ports being located between the interiorof the casing and said chambers, and a pair o1" reversible rotary.interengaging impellers within the casing and operating means therefor,of a valve at one side of the casing controlling an intake port and anoutlet port, another valve at the other side of the casing controllingan outlet port and an intake port, and means for reversing the positionsof said valves to reverse the passage of air currents through thecasing.

2. In a reversible rotary blower including an impeller casing, thecombination of interengaging rotary impel'lers mounted in the casing,and reversible means for driving .the impellers, said casing having apair of controlled and opposed intake port-s and another pair ofcontrolled and opposed outlet ports, and means co-acting with opposedwall-openings in the casing and operative to alternately open and closethe .ports in the respective pairs of ports to reverse the entry anddelivery directions of air currents through the casing.

3. In a reversible rotary blower, the combination with an exteriorhousing having spaced constant intake and delivery chambers, of a casinglocated between said chambers, said casing having a pair of opposed andcontrolled intake ports adapted to be alternately -opened and closed anda pair of opposed and controlled outlet ports adapted to be alternatelyopened and closed, rotary interengaging liinpellers mounted in thecasing between pairs of ports, reversible means i'or driving theimpellers, and two spaced movable devices coacting with openings inopposite endwalls of the casing operable to open and close therespective pairs of intake and outlet ports with relation to therespective intake and delivery chambers.

4. In a reversible rotary blower, the combination with an exteriorhousing having spaced constant intake and delivery chambers, of a casinglocated between said chambers, said casing having a pair of opposed andcontrolled intake ports adapted to be alternately opened and lclosed anda pair of opposed and controlled outlet ports adapted to be alternatelyopened and closed, rotary interengag-ing impellers mounted in the casingbetween pairs of ports, reversible means for driving the impellers, twospaced movable devices `co-acting with openings in opposite endwalls lofthe casing operable to open and close the respective jpairs of intakeand outlet ports with relation to the intake and delivery chambers,reversing means to control the driving means, and operative connectionsbetween said reversing means and said movable devices, whereby the entryand delivery directions of air currents are reversed through the casing.

5. In a reversible blower, the combination of an exterior housing andinterior casing form-ing separate intake and delivery chambers withinthe housing, interengaging rotary impellers mounted in lthe casing Iandoperating means therefor, said casing having wall-openings at op'-posite sides of the impellers communicating with one or another of thechambers, a pair of opposed ap valves pivotally mounted between saidchambers at opposite sides of the impellers with their free edgesoo-acting alternately with spaced edges of the wall openings, means forreversing the rotation of the impellers and cooperating means forreversing the positions of the valves.

FRANK B. YINGLING.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date '713,443 Jewell Nov. 11, 19021,904,056 Kjaer Apr. 18, 1933 2,037,407 Taylor Apr. 14, 1936 FOREIGNPATENTS Number Country Date 265,511 Great Britain 1927 340,777 GreatBritain 1931 550,082` Great Britain 1942 706,058 France 1931

